A fall furnace maintenance guide covering filters, thermostat checks, venting awareness, carbon-monoxide alarms, airflow and professional heating-system inspection.
Before heating season, the furnace should be ready to operate safely and move the required airflow through the home.
Homeowners can check filters, thermostat operation and visible conditions, but combustion, gas, ignition and internal safety checks require qualified service procedures.
The first heating cycle of the season is also a useful time to listen for unusual operation and confirm that the system completes a normal cycle.
A restrictive filter can raise furnace operating temperature and contribute to limit cycling.
Verify heat mode and normal response before cold weather arrives.
Do not block combustion-air or vent terminations and report visible venting damage.
Maintain household CO alarms according to their manufacturer instructions and applicable requirements.
Ignition and combustion should be evaluated professionally when service is performed.
Proper blower operation is necessary to remove heat from the furnace and distribute it to the home.
Filters, thermostat settings, visible outdoor-unit clearance, unusual noise, water and changes in comfort are all useful things for a homeowner to monitor. Catching a change early can prevent a minor condition from becoming a larger service problem.
Electrical testing, refrigerant evaluation, combustion analysis, internal equipment cleaning, airflow measurement and safety-control checks should be performed by qualified personnel using the appropriate procedures and instruments.
Use symptom-based guides when the system is already malfunctioning.
Understand the components being maintained.
Learn why filters and restrictions affect system performance.
Use Central HVAC's homeowner planning and evaluation tools.
If you notice repeated cycling, poor comfort, water, ice, unusual odors, abnormal noise or a sudden change in operating performance, maintenance alone may not be the answer. The system should be diagnosed.
Understand what the maintenance task is protecting.
Identify common service parts and components.